RLI Corp.
US ˙ NYSE ˙ US7496071074

SecurityRLI / RLI Corp.
InstitutionMarkel Corp
Latest Disclosed Ownership2,394,544 shares
Latest Disclosed Value $ 136,584,790
Markel Corp ownership in RLI / RLI Corp.

On May 1, 2026 - Markel Corp filed a 13F-HR form disclosing ownership of 2,394,544 shares of RLI Corp. (US:RLI) valued at $136,584,790 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 2,394,544 shares of RLI Corp.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $119,918,764 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-01 2026-03-31 13F RLI COM 749607107 2,394,544 0 0.00 136,585 -10.85 1.1440
2026-02-06 2025-12-31 13F RLI COM 749607107 2,394,544 0 0.00 153,203 -1.90 1.2213
2025-10-31 2025-09-30 13F RLI COM 749607107 2,394,544 0 0.00 156,172 -9.69 1.2675
2025-08-01 2025-06-30 13F RLI COM 749607107 2,394,544 0 0.00 172,934 -10.10 1.4621
2025-05-02 2025-03-31 13F RLI COM 749607107 2,394,544 1,197,272 100.00 192,354 -2.53 1.7081
2025-02-07 2024-12-31 13F RLI COM 749607107 1,197,272 0 0.00 197,346 6.36 1.7396
2024-11-01 2024-09-30 13F RLI COM 749607107 1,197,272 0 0.00 185,553 10.16 1.6701
2024-08-02 2024-06-30 13F RLI COM 749607107 1,197,272 0 0.00 168,444 -5.24 1.6570
2024-05-03 2024-03-31 13F RLI COM 749607107 1,197,272 0 0.00 177,759 11.53 1.7530
2024-02-02 2023-12-31 13F RLI COM 749607107 1,197,272 0 0.00 159,381 -2.04 1.7326
2023-11-03 2023-09-30 13F RLI COM 749607107 1,197,272 0 0.00 162,697 -0.42 1.9641
2023-08-04 2023-06-30 13F RLI COM 749607107 1,197,272 0 0.00 163,392 2.68 1.9454
2023-04-28 2023-03-31 13F RLI COM 749607107 1,197,272 0 0.00 159,129 1.25 2.0245
2023-02-03 2022-12-31 13F RLI COM 749607107 1,197,272 0 0.00 157,166 28.22 2.1072
2022-11-04 2022-09-30 13F RLI COM 749607107 1,197,272 0 0.00 122,576 -12.19 1.8092
2022-08-05 2022-06-30 13F RLI COM 749607107 1,197,272 0 0.00 139,590 5.39 1.9956
2022-04-29 2022-03-31 13F RLI COM 749607107 1,197,272 0 0.00 132,455 -1.31 1.4703
2022-02-04 2021-12-31 13F RLI COM 749607107 1,197,272 0 0.00 134,214 11.80 1.5442
2021-11-05 2021-09-30 13F RLI COM 749607107 1,197,272 0 0.00 120,051 -4.13 1.5177
2021-08-06 2021-06-30 13F RLI COM 749607107 1,197,272 0 0.00 125,222 -6.26 1.5851
2021-04-30 2021-03-31 13F RLI COM 749607107 1,197,272 0 0.00 133,580 7.12 1.8488
2021-02-05 2020-12-31 13F RLI COM 749607107 1,197,272 0 0.00 124,696 24.39 1.8576
2020-10-30 2020-09-30 13F RLI COM 749607107 1,197,272 0 0.00 100,247 1.98 1.7000
2020-08-03 2020-06-30 13F RLI COM 749607107 1,197,272 0 0.00 98,296 -6.63 1.8311
2020-05-01 2020-03-31 13F RLI COM 749607107 1,197,272 0 0.00 105,277 -2.32 1.9801
2020-02-07 2019-12-31 13F RLI COM 749607107 1,197,272 0 0.00 107,779 -3.11 1.4964
2019-11-01 2019-09-30 13F RLI COM 749607107 1,197,272 0 0.00 111,238 8.40 1.6807
2019-08-02 2019-06-30 13F RLI COM 749607107 1,197,272 0 0.00 102,619 19.46 1.5779
2019-05-03 2019-03-31 13F RLI COM 749607107 1,197,272 0 0.00 85,905 4.00 1.4397
2019-02-08 2018-12-31 13F RLI COM 749607107 1,197,272 0 0.00 82,600 -12.20 1.5782
2018-11-02 2018-09-30 13F RLI COM 749607107 1,197,272 0 0.00 94,082 18.72 1.5867
2018-08-03 2018-06-30 13F RLI COM 749607107 1,197,272 0 0.00 79,247 4.42 1.4545
2018-04-27 2018-03-31 13F RLI COM 749607107 1,197,272 0 0.00 75,895 4.50 1.4427
2018-02-09 2017-12-31 13F RLI COM 749607107 1,197,272 0 0.00 72,627 5.75 1.3712
2017-10-27 2017-09-30 13F RLI COM 749607107 1,197,272 0 0.00 68,676 5.02 1.3673
2017-07-28 2017-06-30 13F RLI COM 749607107 1,197,272 0 0.00 65,395 -9.00 1.3948
2017-04-28 2017-03-31 13F RLI COM 749607107 1,197,272 0 0.00 71,860 -4.93 1.6189
2017-02-10 2016-12-31 13F RLI COM 749607107 1,197,272 0 0.00 75,584 -7.65 1.8217
2016-11-04 2016-09-30 13F RLI COM 749607107 1,197,272 0 0.00 81,846 -0.61 2.1097
2016-08-05 2016-06-30 13F RLI COM 749607107 1,197,272 0 0.00 82,348 2.87 2.1703
2016-05-06 2016-03-31 13F RLI COM 749607107 1,197,272 0 0.00 80,050 8.28 2.1488
2016-02-16 2015-12-31 13F RLI COM 749607107 1,197,272 0 0.00 73,932 15.36 2.0012
2015-11-09 2015-09-30 13F RLI COM 749607107 1,197,272 0 0.00 64,090 4.16 1.6884
2015-08-14 2015-06-30 13F RLI COM 749607107 1,197,272 0 0.00 61,528 -1.95 1.5365
2015-05-07 2015-03-31 13F RLI COM 749607107 1,197,272 0 0.00 62,749 6.09 1.5862
2015-02-09 2014-12-31 13F RLI COM 749607107 1,197,272 0 0.00 59,145 14.11 1.5607
2014-11-12 2014-09-30 13F RLI COM 749607107 1,197,272 0 0.00 51,830 -5.44 1.4617
2014-08-08 2014-06-30 13F RLI COM 749607107 1,197,272 0 0.00 54,811 3.48 1.5628
2014-05-13 2014-03-31 13F RLI COM 749607107 1,197,272 596,012 99.13 52,967 -9.54 1.6262
2014-02-11 2013-12-31 13F RLI COM 749607107 601,260 0 0.00 58,551 11.39 1.8507
2013-11-12 2013-09-30 13F RLI COM 749607107 601,260 -10,598 -1.73 52,562 12.43 1.8020
2013-08-08 2013-06-30 13F RLI COM 749607107 611,858 611,858 46,752 1.6723
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.